Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd13115cdd9950e1ac6fc92ca4f8cd2782e31e58a5c26029a76c5be79e2f1fb4b' 
  AND token = 'Qwe4z2h7OeBRrekcagmR60kPKUt8bD/ivK50yMPGt4o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}